Abstract

In the present study, several polypropylene/silica nanocomposites (PP/SiO₂), containing 3 and 5 wt.% of untreated silica nanoparticles in presence of stearic acid (SA) as modifier agent, were prepared by melt mixing. Various analyses were used to characterize the dispersion and the properties of nanocomposites. Mechanical properties were found to increase and to be mainly affected by the content of silica and modifier agent. For the tensile modulus and yield point, a maximum was observed, corresponding to the samples in presence of 1% SA. In addition, an improvement in thermal stability and impact strength was obtained.

中文翻译：

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硬脂酸改性剂存在下热塑性聚合物/二氧化硅纳米复合材料的结构-性能关系

摘要

在本研究中，通过熔融混合制备了几种聚丙烯/二氧化硅纳米复合材料 (PP/SiO ₂ )，其中含有 3 和 5 重量％的未处理二氧化硅纳米颗粒，硬脂酸 (SA) 作为改性剂存在。使用各种分析来表征纳米复合材料的分散性和性质。发现机械性能增加并且主要受二氧化硅和改性剂含量的影响。对于拉伸模量和屈服点，观察到最大值，对应于存在 1% SA 的样品。此外，还获得了热稳定性和冲击强度的改进。